Assessment of the influence of contact surface roughness on thermal conductivity

The presented work describes a modified technique for numerical modeling the characteristics of contact pairs in technical systems, based on the use of microgeometry parameters of contacting surfaces. The microgeometry parameters of the contacting surfaces are determined according to the measurements of their roughness profile. The described technique allows one to reduce significantly the sample size of the values of local extrema of microprotrusions and microdepressions that have a real impact on the value of contact thermal resistance. The described technique can significantly reduce time and hardware costs and simplify the calculation procedure itself. In addition, the proposed methodology by introducing a specified sampling interval allows you to set the required level of accuracy at the initial stage.